General

Audubon's Shearwater: Small, stocky seabird with dark brown upperparts and white underparts. Underwing coverts are white. Tail is dark brown with short, gray undertail coverts. Bill is dark and legs and feet are pink. Sexes are similar.

Range and Habitat

Audubon's Shearwater: Ranges across tropical parts of the Indian Ocean, north to the Arabian Sea, throughout the north-eastern and central Pacific Ocean, and the western Atlantic Ocean. Wanders northward along the Gulf Stream from the Caribbean and Bermuda as far as the Carolinas and New England. Breeds mainly on oceanic islands, coral atolls and rocky offshore islets.

Breeding and Nesting

Audubon's Shearwater: One white egg is laid on the ground under a clump of dense vegetation or in a rock crevice. Both parents incubate the egg for about 51 days.

Foraging and Feeding

Audubon's Shearwater: Feeds on fish and squid; forages by snatching prey from surface or plunge diving to depths of about six feet.

Vocalization

Audubon's Shearwater: Makes squeals, grunts, and coos on breeding grounds and during confrontations with other birds.

Similar Species

Audubon's Shearwater: Manx Shearwater has white undertail coverts, is larger and has a different flight pattern. Barolo Shearwater is slightly smaller, has a white face, and more extensive dark markings on the underwings.